Valve.



E. L. RUSSELL.

VALVE.

APPLICATION FILED AUG.2I\ 19H.

RENEWED FEB. BL I9I5.

Putelultedsept. 14, 1915.

Lgmmoa EDWIN L. RUSSELL, F CLEVELAND, OHIO.

VALVE.

rieos.

Specification of Letters Patent.

Patented Sept. 31d, 1915.

Application led August 21, 1911, Serial No. 645.2124. Renewed February8, 1915. Serial No. 6,803.

To cil i/:io/i 'it may concern:

Be it known that l.. llnwix L. RUssnLL, a citizen of4 the United States,residing at Cleveland, in the county of Cuyahoga and State ot Ohio. haveinvented a new and useinl Valve, ot' which the 'following is a speciiication.

It has heretofore been proposed to provide a. rotary valve structure forcontrolling the induction and eductioii ot gases and fuel in an internalcombustion engine but, so far as I ain aware, such structures have notproven to be practical and satisfactory because, if the valve be made ofsuhicient diameter to provide large enough port areas, the expansion andcontraction due to excessive and unavoidable changes in teml'ieratiire,is so great as to cause such leakage as to malte the device practicallyinoperative.`

)ne of the objects ot in v present invention therefore to produce arotary valve structure especially designed for gas engine purposes, itsconstruction, more especially its connection with a driving member,being such that variations in diameter. due either to wear or ltochanges in temperature, or variations due to changes in lubrication orotl'ierwise. normally tending to vary the fit relation of the valve toits seat or to vary its resistance to movement along its scat7 will heautomatically coiiil'iciisated.

The accompanying d rai-wings illustrate my invention.

Figure l is a vert-ical section ot a gas engine provided with mvimproved valve and Fig. 2 a section on line 2 2 ot Fig. l on a largerscale.

In the drawings. 10 indicates thecyliiider or'coinbiistion chamber ot'an internal coinhustion engine. ll the piston, l2 the crank sliaflt andl?) the connecting pitinan. all of any desired construction.Coinnninicating with' the combustion chamber l() is a` valve chamber 1lin which is mounted a rotary valve 15. This valve. in the torni shown inthe present drawings. is provided with an inlet passage 16 which isalways in coinyninnication 'with the'inlet chamber 17, and with anexhaust passage 1S for intermittently registeringlwitli the exhaustpassage 19 of the valve chamber. roth the inlet and exhaust passages 1Gand 1S register inter vinittently and alternately with tliekcomhinefinlet and exhaust passage 2l leading from 55 the valve chamber into thecylinder. It will be notedV that, lin the; torni shown in the drawings.the valve has a diameter practically equal to the diameter otthecylinder \aiid as a consequence very large port areas and passages maybe obtained. It' an attempt be made to drive such a valve by ordinary inlans it will be itound that. it' the valve were tight when cold it wouldbe so tight when hot, after the engine had been in operation for a fewmoments, that it could not be moved and if sufficient allowance weremade to permit the operation of the valve when hot it would beimpossible to obtain proper compressions in the cylinder when the enginewas cold. In order to avoid this ditliculty therefore and at the sainetime maintain the valve always at or in its seat with a substantiallyunitorin pressure which is not great enough to interfere with itsoperation, I have provided the following mech-v ed into these cam slots'rpin the valve l5y are one or more suitableprojections. such as twopins 3l. (only one .being shown). Head 2H is provided with a. pair ofdianietrically opposed and radially extending lugs 32, 32 and betweenthese lugs and corresponding pins 32S, Sli-l carried by the valve. Imount compression springs 3l, BJC which springs tend to drive the valvein the direction of ro tation ot' shaftI 25. Valve 15 by thisarrangement becomes movable no't only along its seat c. rotatively) butalso becomes movable away .trom its seat (i. c. axially) in the formillustrated, and thel force which tends to drive the i'alve along itsseat is primarily transn'iitted to the vvalve through he. springs 3l.It' the resistance ot the val fe to movement along its seat is t'or anycause greater than it should (be, either by reason olf expansion ot' thevalve within its seat, or .lack ot lubrication, carbonization orotherwise, springs 34 will be compressed by an initial independentforward movement of shaft 25 and would thus exert ay somewhat greaterdriving force upon the valve. At' the same time the initial independentadvancement of the shaft 9.5 will shift cam slots 29 with re lation topins'Z-ll and will thus drive the rarily thus insuring a sufficientdiminution of its resistance to forward movement to per mit such forwardmovement. As soon as the valve has started in its forward move- 5 mentits resistance to such forward movement will decrease and springs 3%will thus automatically forward the valve and hold it to its seat withthe desired tension of springs 34 so as to maintain a proper joint. .0/It will be noted that, in the formv shown, the connection between shaftand valve v15S/His such that there can be no axial moveinv nt of thevalve away from its seat except y a relative rotative movement betweenthe 15'/I shaft and valve and consequently pressures from the combustionchamber acting upony 'the valve cannot tend to blow it from its seat. Iclaim as my invention:

1. In an internal combustio; engine, the combination with the combusfJon chamber, piston and shaft connected therewith, of a circular valvechamber communicating with fthe combustion chamber, a valve rotatably2r;` mounted in said valve chamber. and controlling the communicationbetween the valve chamber and combustion chamber, a valve driverconnected with said shaft, and a connection between said driver andvalve permitting relativeA rotation and, upon relative rotation only,causing axial shifting of the valve toward or from its seat. A 2. In aninternal combustion engine, th combination with the combustion chamber,piston and shaft connected therewith, of a valve chamber having a.seated communica-l tion with the combustion chamber, a valve seatedtherein and movable both along and away from said seat, a valve driverconnected with the shaft, and a yielding connection between saiddriverand valve such that abnormal resistance of the valve to movement alongits seat will cause initial movement of the valve away from its seat.

3. In an internal combustion engine, the combination :with thecombustion chamber,

piston and shaft connected therewith, of a valve chamber having a seatedcommunication with the combustion chamber, a valve BQA drivingconnection between the driver and valve whereby rotative advancement ofthe drlver independent of rotative advancement .of the valve will movethe valve axially away from its seat, and means urging the valve to itsseat. l

5. In an internal combustion engine, the combination with the combustionchamber, piston and shaft connected therewith, of a tubular taperedvalve chamber having a, seated communication with thecombustion chamber,a taperedA rotary valve driver oonnected with the shaft, al rotatablescrew driving connection between the driver and valve wherebyrotativeadvanceinent of the driver independent of rotative advancementof the valve will move the valve axially away from its seat, and aspring driving connectionbetween the driver' and valve urging the valveforward rotatively.

In witness whereof, I have hereunto set my hand and Seal atIndianapolis, Indiana, this 16th day of August, A. D. one thousand ninehundred and eleven.

EDWIN L. RUSSELL. [1, s.)

Copies of this patent may be obtained for ve c'ents each, by addressingthe Commissioner of Patents,

' Washington, D. 0.

soA

